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A/C will not work compressor clutch will not kick on?

Tiny
BURRESS 1998
  • MEMBER
  • 18 POSTS
On my other suburban it does the same thing with the test light, except before the compressor kicks on the light goes off. I can send you a video tomorrow if you would like. So that is why it's mind-blowing (hypothetically) unless the PCM was supposed to lose ground to make the relay work, lmao. I'm so lost.
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Sunday, April 23rd, 2023 AT 8:08 PM
Tiny
BURRESS 1998
  • MEMBER
  • 18 POSTS
I didn't have ground today when I disconnected the PCM I can check again though.
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Sunday, April 23rd, 2023 AT 8:10 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,896 POSTS
Hi,

I can't be 100% sure, but here is what I think is happening. When you check the circuit with a test light or multimeter, there is basically little to no load on the circuit. When an actual load is required, the ground is failing.

When you say there was no ground, do you mean at all times?

Let me know.

Joe
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Monday, April 24th, 2023 AT 6:07 PM

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